Robert F. Chew, a 52-year-old Baltimore actor and teacher who portrayed one of television’s most unforgettable characters as Proposition Joe on HBO’s “The Wire,” died Thursday of apparent heart failure in his sleep at his home in Northeast Baltimore, according to Clarice Chews, his sister.

Mr. Chew, who appeared in “Homicide” and “the Corner,” as well as “The Wire,” also taught and mentored child and young adult actors at Baltimore’s Arena Players, a troupe he stayed with as his television career blossomed through his work with David Simon. Through the Areana Players Youth Theatre, he brought new talent to the attention of casting directors and coached the team of young actors who played students in the Baltimore City School system in Season 4 of “The Wire.”

“Robert was not only an exceptional actor, he was an essential part of the film and theater community in Baltimore,” David Simon, creator of ‘The Wire’ said in an email Friday. “He could have gone to New York or Los Angeles and commanded a lot more work, but he loved the city as his home and chose to remain here working. He understood so much about his craft that it was no surprise at all that we would go to him to coach our young actors in season four. He was the conduit through which they internalized their remarkable performances.”

Chew was an absolute master with dialogue and facial expressions, and it’s fascinating to learn in this article that many of the kids who starred in Season 4 of “The Wire” were his students. If you haven’t seen this show, get the DVD or download it now. You won’t regret it.